/*
 * Copyright (c) 2006, 2023, webrx.cn All rights reserved.
 *
 */

package cn.webrx;

import java.util.HashMap;
import java.util.Map;

/**
 * <p>Project: jse2303 - Hashtable1
 * <p>Powered by webrx On 2023-07-20 09:35:03
 * <p>描述：<p>
 *
 * @author webrx [webrx@126.com]
 * @version 1.0
 * @since 17
 */
public class Hashtable1 {
    public static void main(String[] args) {
        Map<String, String> t = new HashMap<>();
        t.put("bj", "北京市");
        t.put(null, null);
        System.out.println(t.size());

        System.out.println(t);
    }
}
